.grandFather{
    display: flex;
    width: 150px;
    height: 150px;
    background-color:orange;
    border-radius: 50%;
    justify-content: center;
    align-items: center;
    .father{
        display: flex;
        width: 100px;
        height: 100px;
        background-color:springgreen;
        border-radius: 50%;
        justify-content: center;
        align-items: center;
        .son{
            display: flex;
            width: 60px;
            height: 60px;
            background-color:skyblue;
            border-radius: 50%;
            justify-content: center;
            align-items: center; 
        }
    }
}